Lunar Eclipse | 4 Apr 2015 | Tetrad Part 3

Previous Tetrad Posts:

Tetrad Part 1 Explanation and what to expect

My images of Part 1

Tetrad Part 2 My images of part 2

What To Expect

The third part of the Lunar Eclipse Tetrad takes place just before sunrise on April 4, 2015, low in the western sky for us in the central U.S. For observers in the eastern time zone of the U.S., they will not see the total eclipse phase. The Moon will set before it begins. They will see some of the partial eclipse phase. Those of us in the central time zone will see the total eclipse phase just as the Moon sets in the west. Observers farther to the west will be able to witness more of totality before it sets. The best location is Hawaii except that you need to observe in the middle of the night.

I prepared a video with my desktop planetarium software of the view to the west horizon for my location in Iowa. The time covered is from 5:10 am until a few minutes after 7:00 am. Note that the Moon will set at the same time that the Sun rises. This can only happen during a total lunar eclipse because of their alignment with Earth.

This diagram is courtesy of Fred Espenak for the central time zone. Adjust by adding an hour for eastern and subtracting an hour for each zone to the west. The Moon will experience totality for a brief 5 minutes. I hope you have clear skies and you remember to get up to watch.

All times are CDT | Click to embiggen

Science@NASA provided this summary video.



18 thoughts on “Lunar Eclipse | 4 Apr 2015 | Tetrad Part 3

    • You will be able to see the moon entering the shadow of the earth. It will set for you before it is totally in shadow. Still a good show. You need a view to the west close to the horizon.

  1. I just checked my zone and we are only going to be able to see a “penumbral lunar eclipse”. Not much, then for us. Thanks for all the detailed explanations.

    • There is another in September. It is the 4th of the tetrad. You are in going to be well positioned to see the whole thing start to finish. More later as we near that date. 🙂

  2. Well, phooey. I was up and about, but high clouds obscured things. I’ll have to give it another try in September.

    But! Here’s an interesting tidbit for you. It’s time for cataract surgery, and I’m having to spend a few weeks out of hard contacts and into glasses, while the gurus take regular measurements to figure out when my eyes stop shape-shifting and lenses can be made.

    But that’s not the interesting tidbit. About three months ago, I noticed that every time I looked at the full moon, my right eye wasn’t just blurry, it saw the moon like this. Every month, there was a bit more of a bite taken out of that moon. Needless to say, I found that more than a little freakish, but last week, when I remembered to ask the technician about it, he just laughed. As it turns out, some people have only blurry vision as a sign of their cataracts, but, depending on where it sets up and how it grows, others will experience the “eclipse” phenomenon.

    So, missing the eclipse in the sky was a disappointment, but I have my own personal eclipse as a consolation prize. I like to talk about nature’s analogies (fungi that look like rocks, sea creatures that look like flowers, etc.) but this is one I never would have expected.

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